.grid {
	display: grid;
	grid-template-columns: 1fr 1fr 1fr;
	grid-gap: 3%
}
.grid div {
	width: auto;
	height: auto;
	justify-content: center;
}
.grid video, iframe {
	width: 100%;
	height: 100%;
}
article {
	margin-top: 5%;
	justify-content: center;
}
footer {
	margin-top: 5%;
	background-color: olive;
	font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
	font-size: 25px;
	line-height: 50px;
}
nav {
    margin-bottom:0.1em;
	font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
	font-size: 50px;
}
nav ul {
    list-style-type:none;
    margin:0;
    padding:0;
	display:flex;
}
nav li { flex-grow: 1;
}
nav a {
    display: block;
    padding: 1em;
    text-align: center;
    text-decoration: none;
    color: #000000;
    border: solid 1px #424242;
    transition: all 0.5s;
	text-transform: uppercase;
	background-color: olive;
}
nav a:hover {
	background-color: lightgreen;
}

@media (orientation: landscape) {
	section {
		grid-template-columns: 3fr 1fr;
	}
	nav ul {
		flex-direction: row;
	}
	a {
		margin-right:0.2em;
	}
}
@media (orientation: portrait) {
	section {
		grid-template-columns: 1fr;
	}
	nav ul {
		flex-direction: column;
	}
	nav a {
	margin-bottom:0.2em;
	}
}